Chain dbiving-belt



.I. E. DUKELOW.

CHAIN DRIVING BELT.

APPHCATION FILED JUNE 23. 1913.

1 Patented Aug. 12, 1919.

JOHN E. DUKELOW, OF CHICAGO, ILLINOIS.

CHAIN DRIVING-BELT.

Specification 0! Letters Patent.

Patented Aug 12, 1919.

Application filed June 23, 1913. Serial No. 775,293.

To all whom it may concern:

Be it known that I, JOHN E. DUKnLow, a citizen of the United States, residm at Chicago, in the county of Cook and of Illinois, have invented certain new and useful Improvements in Chain Drlving- Belts, of which the following is a description.

My invention relates to chains for frictionally connecting a pair of sheaves for transmitting power from one shaft to another.

The object of my invention is to provide a simple, strong and durable connector of the kind described, arranged to obviate wear between the links as far as possible and produce an exceptionally substantial and durable driving member.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims. a

In the accompanying drawings wherein like or similar reference characters indicate like or corresponding parts.

Figure 1 is a fragmentary viewof a portion of a rim of a sheave cooperating with my improved chain, with parts removed and broken away to more clearly show the construction and relation of the several parts.

Fig. 2 is a plan view of my improved chain.

Fig. 3 is a section taken substantially on line 3-3 of Fig. 1.

Fig. 4 is a perspective detail view of a single link of my lmproved chain.

In the form shown in the draw' my device consists of a plurality of suh stantially similar links 11 each having a chamber 2 at one end and a projection 3 at the opposite end adaptedv to extend into the chamber 2 of the next adjacent link to connect the links together. As shown the chamber 2 is rectangular in form and the side walls converging inward toward the bottom of the chain or" toward the sheave to correspond with the form of the groove in the tate - foreign material.

3 is preferably T shaped having a stem or shank 9 and a head 10. The stem 9 is attached to the center portion of the wall 17 ogposite the wall 5 and is adapted to extend t rough the slot 8. A transverse wall. or head 10 is formed at the free end of the stem with its inner or bearing surface curved vertically as shown but transversely substantially at ri ht angles to the center line of the link. pair of ribs or projec tions 11 and 12 are provided upon the bearing surface of the head 10 adapted to fit in and cotiperate with the grooves 6 and 7 respectively, to prevent transverse movement between the wall 5 and head 10. The several parts are so constructed and arranged that when the chain extends substantially in a straight line the lower portion 14 of the head or wall 10 rests against the lower portion of the wall 5; the ridge 11 cooperating with the groove 6 to accurately maintain the links in position. In passing over a sheave or other point where the chain is deflected the surface 15 between the ribs 11 and 12 which is preferably curved as shown engages the flat surface of the wall of the next adjacent link and as the deflection increases it gradually withdraws the rib 11 from the groove 6 and moves the rib 12 into engagement with the groove 7 thus constantly holding the bearing surfaces against slipping transversely of the ribs and grooves. The. several parts are 'so constructed that when the links are deflected as in the. ordinary movements of the chain the surfaces of the wall 5 and head 10 will roll upon each other without sliding, thereby avoiding friction and the consequent wear between the surfaces. In the preferred construction suitable flanges 16 extend from the wall 17. of the chamber to the stem 9 to strengthen the same, and projections 18 extend from the upper margin of the wall 5 to the side walls of the chamber to strengthen the same and to partially close the opening into the chamber to exclude grit or other The several parts however are so constructed that the head 10 may be passed through the opening 19 in Er operates, a cushion 20 formed of leather,-

the top of the chamber for connecting or disconnectin the links. Where it is desired to avoid metallic contact between the chain and the sheaves with which it co- .canva's or other suitable resilient material may be provided of suitable width to cover the side walls of the links and extend across their bottom and suitable rivets 21 or other convenient means are provided to attach the cushion to the bottom wall of the chamber to hold the cushion in position and where it is desired to operate the chain upon sheaves of comparatively small diameter suitable openings 22 may be provided in the cushion to increase its flexibility.

'Having thus described my improvements it is obvious that various immaterial modifications maybe made in my device without departing from the spirit of my invention, hence, I do not wish to be understood as limiting yself to the exact form or construction shown.

What I claim as new and desire-to secure by Letters Patent is:

1. A chain comprising a plurality of links each having a chamber at one end and a projection at the opposite end adapted to enter the chamber 0 the next adjacent link, the end wall of said chamber and of said projection bein each provided with a substantially flat hearing surface adapted to codperate with a flat bearing surface upon the next adjacent link to connect said links together, said bearing surfaces having a depression at one margin thereof adapted to coiiperate' with a projection atone margin of a bearing surface of the next adjacent link to prevent the displacement of said latter bearing surfaces upon each other.

2. A chain comprising a plurality of 'links each provided with a socket having a hat bearing surface at one end thereof and a head provided with a curved bearing surfaceat the opposite end, said head adapted to enter the socket of the next adjacent link, the curved bearing surface of each head adapted to cooperate with the bearhig surface wlthin the socket of the adjacent link when the links are connected together.

3. A chain comprising a-plurality of links each having a chamber at one end and a T shaped projection at the opposite end, the end wall of said chamber provided with a flat bearing surface and the i' shaped projection provided with a curved bearing surface, said surfaces adapted to coiiperate with each other when theT shaped projection is inserted into the chamber of the adj a cent link to connect the links together.

4. A chain comprising a plurality of con-v nected links each provi d with a flat bearing surface at oneend thereof and a curved bearing surface at the opposite end, the fiat bearing surface of each link adapted to cooperate with the curved bearing surface of the adjacent link when the links are connected together.

5. A chain comprisin a plurality of con nected links each provi ed with a flat hearing surface at one end thereof and a curved bearing surface at the opposite end, the flat bearing surface of each link adapted to cofiperate with the curved bearin surface of the adjacent link when the lin s are connected together and means for preventing the transverse movement of said bearing surfaces upon each other.

6. A chain comprisin a plurality of connected links, each provi ed with a fiat bearing-surface at one end thereof and a curved bearing surface at the opposite end, the fiat bearing surface of each .link adapted to 00- operate .with the curved bearing surface of the adjacent link when the links are connected together and means at one margin of said bearing surfaces for preventing the transverse movement of said bearing surfaces upon each other.

7. A chain comprisin a plurality of connected links each provi ed with a flat hearing surface at one end thereof and a curved bearing surface at the opposite end, the flat bearing surface of each link adapted to cooperate with the curved bearin surface of the adjacent link when the lin ks are connected together, one bearing surface having bearing surface at the opposite end, said head adapted to enter the socket of the next adjacent link the curved bearing surface of each head adapted to cofiperate with the bearing surface within the socket of the adjacent link when the links are connected together.

9. A chain comprising a plurality of detachable links each having a chamber at one end and a T shaped projection at the OPPO- site end, the end wall of said chamber being divided centrally and provided with a plurality of flat bearing surfaces, and the projection being centrally divided to provide a plurality of bearing surfaces the latter surfaces being curved and adapted to cooperate with the flat bearing surfaces within the tachable links eac having a chamber at one end and a T shaped projection at theopposite end, the end wall of said chamber being divided centrally and provided with a plurality'of flat bearin surfaces, and the projection being central y divided to provide a plurality of bearing surfaces, the latter surfaces being curved and adapted to cooperate with the flat bearing surfaces wit in the chamber when the T shaped pro- 10 ection is inserted in the chamber of the next adjacent link and means for preventing the In testimony whereof, I have hereunto signed my name in the presence of two sub- 15 scribing witnesses.

JOHN E. DUKELOW. Witnesses:

BLANOHE (humans; BURTON U. HILLS, 

